| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 45.75 | Reed, Keshun (2016) (Martin, TX) (US#3) | TX 6A State Meet(TX), 2015-05-16(#1) |
| B-400 | 2 | 46.66 | Schwartz, Rhayko (2015) (Boyd, TX) (US#14) | TX 6A State Meet(TX), 2015-05-16(#3) |
| B-400 | 3 | 47.62 | Wallace, Brenden (2015) (Allen, TX) (US#58) | USATF JO Southwest Assn(TX), 2015-06-20(#2) |
| B-400 | 4 | 47.76 | Cargile, Quentin (2015) (Timber Creek, TX) (US#74) | TX 6A Region 1 Arlington(TX), 2015-05-02(#3) |
| B-400 | 5 | 47.80 | Birk, Jamarkus (2017) (North Crowley, TX) (US#79) | TAAF Games of Texas(TX), 2015-08-02(#3) |
| | | National Elites above. State Elites below | | |
| B-400 | 6 | 48.36 | Hooper, Sean (2017) (Fossil Ridge, TX) | USATF JO Southwest Assn(TX), 2015-06-20(#2) |
| B-400 | 7 | 48.43 | Jones, Cameron (2018) (Euless Trinity, TX) | TX 6A Region 1 Arlington(TX), 2015-05-02(#4) |
| B-400 | 8 | 48.78 | Davis, David (2016) (Duncanville, TX) | TAAF Games of Texas(TX), 2015-08-02(#4) |
| B-400 | 9 | 48.85 | Johnson, Jadon (2017) (Lewisville, TX) | AAU JO Region 18 Qualifier(TX), 2015-07-05(#1) |
| B-400 | 10 | 48.90 | Ekweani, Chucky (2015) (Plano, TX) | USATF JO Southwest Assn(TX), 2015-06-20(#7) |
| B-400 | 11 | 49.03 | Bolden, Bronshaye (2015) (Bowie, TX) | Greater SW Showcase(TX), 2015-05-16(#1) |
| B-400 | 12 | 49.10 | Warren, Austin (2016) (Lewisville, TX) | TAAF Games of Texas(TX), 2015-08-02(#5) |
| B-400 | 12 | 49.10 | Nash, Dartavious (2015) (Lamar, TX) | USATF JO Region 12 Qualifier(TX), 2015-07-11(#5) |
| B-400 | 14 | 49.22 | Atkinson, Josh (2015) (Cedar Hill, TX) | TX 6A Area 7-8 Cedar Hill(TX), 2015-04-22(#2) |
| B-400 | 15 | 49.40 | Ellison, Joseph (2015) (Keller Central, TX) | TX 6A Area 5-6 Justin(TX), 2015-04-24(#4) |
| B-400 | 16 | 49.51 | Bender, Glenn (2018) (Allen, TX) | USATF JO Region 12 Qualifier(TX), 2015-07-11(#2) |
| B-400 | 16 | 49.51 | Neely, Cameron (2017) (DeSoto, TX) | USATF JO Southwest Assn(TX), 2015-06-20(#1) |
| B-400 | 16 | 49.51 | Gray, Malik (2015) (Duncanville, TX) | Rockwall Jacket Classic(TX), 2015-02-14(#1) |
| B-400 | 19 | 49.52 | Plunk, Alex (2016) (Tascosa, TX) | TX 6A District 2 Lubbock(TX), 2015-04-17(#1) |
| B-400 | 20 | 49.60 | Brown, Anterius (2016) (Duncanville, TX) | AAU JO Region 18 Qualifier(TX), 2015-07-05(#4) |
| B-400 | 21 | 49.61 | Dicken, Zach (2017) (Coppell, TX) | TX 6A Area 7-8 Cedar Hill(TX), 2015-04-22(#3) |
| B-400 | 22 | 49.63 | Lopez, Thomas (2017) (El Dorado, TX) | USATF JO Border Assn(TX), 2015-06-27(#2) |
| B-400 | 23 | 49.67 | Haywood, Justin (2016) (Cedar Hill, TX) | Luke's Dallas All-Comers 6-30(TX), 2015-06-30(#1) |
| B-400 | 24 | 49.68 | Abalos, Alex (2015) (Coppell, TX) | TX 6A Area 7-8 Cedar Hill(TX), 2015-04-22(#4) |
| B-400 | 25 | 49.71 | Johnson, Adrian (2015) (El Dorado, TX) | TX 6A District 1 El Paso(TX), 2015-04-17(#1) |
| B-400 | 26 | 49.75 | Ross, Donald (2016) (Timber Creek, TX) | TX 6A District 5 Keller(TX), 2015-04-09(#2) |
| B-400 | 27 | 49.95 | Lipscomb, Darrien (2016) (Houston, TX) | TX 6A District 4 Arlington(TX), 2015-04-15(#3) |
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